domotz-remote-pawn/src/commands/snmp/common.js

Domotz Agent

/** This file is part of Domotz Agent.
 * Copyright (C) 2016  Domotz UK LLP
 *
 * Domotz Agent is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Domotz Agent is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Domotz Agent.  If not, see <http://www.gnu.org/licenses/>.
 **/
/**
 *
 * @deprecated
 * USE src/snmp/common.js INSTEAD
 */
/**
 *
 * Created by Iacopo Papalini <iacopo@domotz.com> on 11/04/16.
 */

module.exports.transformer = function (value) {
    'use strict';
    return {
        string: function (o) {
            // https://nodejs.org/api/buffer.html#buffer_buffers_and_character_encodings
            try {
                var s = '' + o;
                if (s.indexOf('\uFFFD') === -1) {
                    return s;
                } else {
                    return o
                        .toString('hex')
                        .match(/.{1,2}/g)
                        .join(' ')
                        .toUpperCase();
                }
            } catch (e) {
                return '' + o;
            }
        },
        mac: function (o) {
            var byteList = [];
            for (var i = 0; i < o.length; i++) {
                var tmpByte = o.readUInt8(i);
                var tmpStr = tmpByte.toString(16);
                if (tmpStr.length < 2) {
                    tmpStr = '0' + tmpStr;
                }
                byteList.push(tmpStr);
            }
            return byteList.join(':').toUpperCase();
        },
        int: function (o) {
            return o;
        },
    }[value];
};

module.exports.extractOids = function (oidsMapping) {
    'use strict';
    var oids = [];
    for (var oid in oidsMapping) {
        if (oidsMapping.hasOwnProperty(oid)) {
            oids.push(oid);
        }
    }
    return oids;
};

module.exports.isEmpty = function (obj) {
    for (var prop in obj) {
        if (obj.hasOwnProperty(prop)) {
            return false;
        }
    }
    return JSON.stringify(obj) === JSON.stringify({});
};

module.exports.extractFromOptions = function (options, field, defaultValue) {
    var value;
    if (options[field]) {
        value = options[field];
        delete options[field];
    } else {
        value = defaultValue;
    }
    return value;
};